呼声定位蝙蝠调整声纳呼叫特征和头部/耳部位置,因为它们在杂乱的情况下跟踪移动的目标
Michael G T Wikinson1, XingYao York Wang2, Noah J Cowan1
1Mechanical Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA.
The Journal of the Acoustical Society of America
|March 27, 2025
概括
大棕色蝙蝠调整回声定位呼叫和头部运动,以在混乱的环境中追踪猎物. 他们缩短了呼叫,增加了头部运动,并使用声纳射线组来改善目标定位.
科学领域:
- 动物行为 动物行为
- 生物声学是一种生物声学.
- 感官生态学 感官生态学
背景情况:
- 呼声定位蝙蝠在复杂的环境中导航和狩猎,经常面临声学混乱.
- 了解蝙蝠如何在杂乱中处理感官信息,对于理解它们的食策略至关重要.
研究的目的:
- 研究大棕色蝙蝠 (Eptesicus fuscus) 在杂乱的环境中追踪猎物时所做的适应性行为和声学调整.
- 测试蝙蝠动态改变回声定位参数和头部运动以克服杂乱干扰的假设.
主要方法:
- 量化回声定位呼叫特征 (持续时间,间隔,功率) 和跟踪移动目标的蝙蝠的头部运动.
- 操纵了相对于蝙蝠和目标路径的杂乱的近距离和角度偏移.
- 利用训练有素的蝙蝠模式,为目标追踪提供食物奖励.
主要成果:
- 蝙蝠缩短了回声定位呼叫的持续时间和间隔,并在猎物接近杂乱时增加了头部运动.
- 在杂乱的条件下观察到声纳闪光组的产量增加,可能会增强空间分辨率.
- 在最大呼叫功率向较低频率的转移发生在杂乱接近目标时.
结论:
- 大型棕色蝙蝠表现出适应性行为,以保持在声学混乱中有效的目标跟踪.
- 在回声定位信号和头部方向的动态调整是蝙蝠在混乱环境中导航的关键策略.
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